The September 11 attacks against the United States by al-Qaeda, generally considered to be the year's most prominent event, killed 2,977 people and instigated the global war on terror. The United S
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc8ec042537c2242c5def5d3fd05cbcb49c9e86793f8a0ebe1416bdc98eaa52. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59a84573-54a4-4bf9-98ff-96a4664a6ccc.json and https://artists.proofprofile.net/proofs/artist/59a84573-54a4-4bf9-98ff-96a4664a6ccc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c5cf9569f03d938c5940d8cbc2b9e0f8d41b392df4756d0703961f1de1643a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2338147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab109a07387b57d595557702c3c9fa9729f6976ac414183a18e399af2dd843a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2338145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b653ae09ac291674eface65c41b691c5784e11107eb6376d45e45a2771290dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2323214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed46eb5125c6ddba529dcc64bc16592d4bd690b9224068804859931476eaae5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2323208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd734bdc747baf23b607278f231b21320e480eff45e9f36ef718d05db9075b53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2320107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e0ec763a144388449014e22d1fbad3d13979da48753abc833115613e65160e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2319372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8e963037466ddb9d3e362e93e9a4d9ceb604c4095fbe1bebf32bcef68f0378. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2315595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934b777246f1140a01d57643f590ee15dae0d4217d93d2c2606b5cb868887aec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2308623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e177bd86a6c01f493a79995009420dd80973c6efcf762e18370c7a6783051d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2308626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6910a433deb16a3cd556dbb515079f906d7b1379f58cfd6f9a3ae2cbe8a7c224. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2308624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca05af065073465a55c3d12752d2ba11c3f47c07a48df9d122ee47a96088644f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2308625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c73f34409c3a907ee544a9a7c4fe02bf7e2fd721da131ea7a08d249ae00d95. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2308627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fef99314f4c2c4fe516dcb6daa6cd9dd83866683fcabb81c29109c86ca35620. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2308641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb03c3166cb5c2abe1d3e0c975f8e040ee502f772f09e1479bb174e8eabcff7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2249176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f405aec04d52ac84edb8cb51d054f4be5256ff7be21cba7a0e8d481e867485e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2239716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33094c2197a55eea458add14e67119e23e28492925849992c341c13d9af613e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2221488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0100c5b0a80501faa36d9e95fc9b538162106a99d6a9fbc08d4502a3edfbbd3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2216607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521e5972d041c62ef798721d6c10d82ae7b0add4d987baba0d40695b242a4591. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2208432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00afc80891643884f928bd02349a338e7d356e4630cb0e81fbe803b9ee80f553. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2200825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd8787001891ae04c8e6c159457c49ef3b777dbb9126023eb3d03ceea2818d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2150749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a7010ea0bc7241e34a96e4d8cc45a361ffbf680789347ca110d6ac077da262. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2147192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8705f7d11c7f762a2d9e5617749c1ce1013a3992b57def7632bc5ac7b6e8fac2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2401540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830aa0a2ecc6f4b82d56a3a5e22ce7e0d1e0fc081ce827a167069084d44c6647. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2411483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fd5cd34973506803a9ceeff32d82354939203465bdbd09c733bccd7a588acd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES75E2404067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332c837b3f1cd41d89f4b64d0a12d10b424bab16dc53c8c53cee3bf893404875. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2405793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc09a71107183112428ae9c51f0198d9d1500fddc566baad3c8e62d2dab3277. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2405794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e49fb922fa66cf9500f7a091efe80b413c9e0d7cb0f4199df868362dd50fe8e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G2403067.